[php-src] Issue #13055: Ability to disable tmp caching of phar contents

Issue: https://github.com/php/php-src/issues/13055 Author: dktapps ### Description It's not clear to me what the point of caching phar contents is. In a world where opcache is used, it shouldn't be necessary to cache the phar contents anyway, except perhaps the occasional data file. In addition, since different threads / processes don't share phar caches, /tmp can get very crowded with lots of files caching near-identical data. I maintain a long-running application in which autoload time is not a concern, but the hogging of tmp space is a problem for my users. There doesn't seem to be a way to stop ext-phar from caching things read from phars.